Marvel Chronology Project

In the Tinkerer listing, there is this:

TINKERER/PHINEAS T. MASON <– ADD MIDDLE INITIAL
...
PPSSM 300 (25:4)-FB
ASM 20-BTS
PPSSM 300 (26:4 - 26:6)-FB
...

What is the nature of this "BTS appearance"? I recently read ASM 20 (1965), and there is no mention of or reference to the whereabouts of the Tinkerer. It doesn't seem like it's a typo for ASM2 20 (2000), so I'm wondering what exactly what this is meant to be.

Any ideas?

DotStinks wrote: ↑Mon May 22, 2023 2:56 amAny ideas?

In All-New Official Handbook of the Marvel Universe A to Z Vol 1 11 is mentioned that the exoskeleton Stillwell adapts and gives to Mac Gargan was created by Tinkerer

so maybe

ASM 20-BTS | cf OHOTMUAZ 11

unless the OHOTMU info comes from a comic book. In that case:

ASM 20-BTS | cf comic book